package com.xr.elm.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.xr.elm.common.CustomException;
import com.xr.elm.entity.Category;
import com.xr.elm.entity.Dish;
import com.xr.elm.entity.Setmeal;
import com.xr.elm.mapper.CategoryMapper;
import com.xr.elm.service.CategoryService;
import com.xr.elm.service.DishService;
import com.xr.elm.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    /**
     * 根据ID分类，删除之前进行判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
//        添加查询条件，根据分类1d进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishLambdaQueryWrapper);
///查询当前分类是否关联了菜品，如果己经关联，抛出一个业务异常
        if (count1>0){
          throw new CustomException("当前分类是否关联了菜品，不能删除 ");
        }

        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(setmealLambdaQueryWrapper);

        if (count2>0){
            throw new CustomException("当前分类是否关联了套餐，不能删除 ");
        }

        super.removeById(id);
    }
}
